.markdown-body {
  h1 {
    font-size: 18px;
    border-bottom: none;
    margin-bottom: 16px;
  }

  h2 {
    font-size: 16px;
    margin-bottom: 12px;
  }

  h3 {
    font-size: 14px;
    margin-bottom: 8px;
  }

  h4,
  h5,
  h6 {
    font-size: 13px;
    margin-bottom: 6px;
  }
}